Motor was out when I had a look which was good for me - I took some pics of firewall and inner wing mods, engine mounts (hilux) and crossmember dressing. Owner guarantees that it fits - ithe 1uzfe is a pretty compact unit. One thing that made a difference was the sump - crown version sump fits...
Not sure how you went with this research. I am planning to do this exact conversion - 1uzfe+supra 5spd into MGB. Had a look at one on the weekend in melbourne - Fits in with bonnet closed - some cutting of firewall but true with any older model 'B'. Sorry if adding to an out of date post -...